Smart Motorway gantry sign
A gantry structure spanning the motorway with electronic signals, blue signs showing an exit and the following text.
Exit destinations: A414 Hemel Hempstead.
Forward destinations: The NORTH, Luton & [Airport symbol] M1.
Junction number: 8.
Junction 7 is another we can't access northbound, bringing traffic from St Albans and the A414. A set of collector-distributor roads run alongside the M1 linking the two junctions, and providing access to junction 8.